LOW-SULFUR SHIP BUNKER FUELS AND METHODS FOR PRODUCTION THEREOF Russian patent published in 2019 - IPC C10G45/02 C10L1/04 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing ship bunker fuels with relatively low content of sulfur, as well as to obtained low-sulfur fuel compositions made in accordance with these methods. Described is a method of producing a composition of low-sulfur bunker fuel, involving: hydrotreatment of the stream of vacuum distillation residue with hydrogen in the presence of a hydrofining catalyst to reduce the sulfur content to not more than 1500 pts.wt. without substantial cracking of the vacuum distillation residue; and mixing the hydrotreated vacuum distillation residue with not more than 10 vol. % of the first hydrocarbon stream boiling within the boiling range of the diesel fuel, and with not more than 40 vol. % of the second hydrocarbon stream, boiling in the range of boiling temperature of diesel fuel, to form low-sulfur bunker fuel composition, wherein the hydrotreated vacuum distillation residue is at least 60 vol. % of the low-sulfur bunker fuel composition; wherein the stream of the vacuum distillation residue contains from 1000 to 10,000 pts.wt./mil of sulfur, the first hydrocarbon stream boiling in the range of boiling points of the diesel fuel, contains not more than 20 pts.wt./mil of sulfur, and the second hydrocarbon stream boiling in the range of boiling range of diesel fuel contains not more than 10 pts.wt./mln of sulfur. Low-sulfur bunker fuel composition obtained by the above method comprises 60 vol. % to 100 vol. % of uncracked hydrotreated vacuum distillation residue containing not more than 1500 pts.wt./mln of sulfur and having kinematic viscosity of at least 350 cSt at 50 °C; up to 10 vol. % of the first hydrocarbon stream boiling in the range of boiling temperature of diesel fuel; and up to 40 vol. % of the second hydrocarbon flow boiling in the range of boiling range of diesel fuel; and wherein said fuel composition has one or more properties selected from the group consisting of: (1) kinematic viscosity from 20 cSt to 400 cSt at 50 °C; (2) density of 800 kg/m³ up to 1000 kg/m³ at 15 °C (3) and pour point of 25 °C to 35 °C. Also disclosed is an uncracked hydrotreated vacuum distillation residue for use in the above method, having T50 of at least 600 °C and containing not more than 1500 pts.wt./mln of sulfur.

EFFECT: technical result is obtaining bunker fuels having low sulfur content.

45 cl, 4 ex, 7 tbl, 1 dwg